I'm 170cm, roughly 5' 7" and I play Rugby for my county. I am EASILY the smallest player on the pitch. Doesn't stop me from being a very good Hooker though! (Hooker as in the rugby position not the profession)

My point is that height doesn't matter, do whatever you want and ignore the freakishly tall slave race.

ehhh height may not matter in an informal game of rugby go against a 6'5 320lb offensive tackle in american football and you'll see height makes a massive difference. Im 6'3 265 and the leverage and size of taller players still requires me to make adjustments against them.

"informal" I play county level, which is semi-pro. and its basic physics, I weigh 13 stone, but I can move a hell of a lot faster than people who weigh 20 stone, I run into them at full speed my momentum is greater. Also, Handegg =/= Rugby, a well place tackle to the legs will allow you to bring anyone down. Mostly I tend to go for the full on tackle, of course there are times that people run through me, so you grab their legs and lock your arms. they'll come down like a ton of bricks.